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(No Mndel.)

A. A, PLUMMER.

STEAM BOILER.

Patented Oct. 2, 1883,

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ABNER Au PLUMMER, OF PUTNAM, CONNECTICUT, ASSIGNOB OF ONE-HALF TOIRVING- H. ROBERTS, OF SAME PLAGE.

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SPECIFICATION forming part of Letters Patent No. 285,923, dated October2, 1883.

Application filed July 12, 1892i. (No model.)

To all whom, t may concern:

Beit known that I, Annan A.PLUM1\rnR, a citizen ofthe United States,residing at l utnam, in the county of Vindham and State of Connecticut,have invented a new and useful Steam-Boiler, of which the following is aspecification, reference being had to the accompanying drawings.

This invention relates to steam-boilers; and its object is to provide akboiler possessing superior advantages in point of simplicity,inexpensiveness, durability, and general etl'r ciency. V

In the drawings, Figure l is a perspective view of my improved boiler.Fig. 2 is a vertical sectional 4view of the same, taken from side toside. Fig. 3 is a vertical sectional view taken from front to rear. Fig.4 is a horizontal sectional view taken through one of thewater-sections.

Referring to the drawings, A designates the boiler proper, which ispreferably cylindrical in form and vertically placed on a suitable base,B, forming the ash-box, and`having the grate C of the iire-ehamber atits top.

The boiler A is formed of several sections, l), each comprising a waterspace or chamber, E, and a ire-space, F, these spaces being arranged toextend over the area ofthe section, while the water-chamber is formedwith a vertical liuc or opening, G, through it. These sections D areentirely separate, and are preferably cast solid, so that there will beno joints to leak, and are placed one upon another, so that theiire-ilues G between the fire-spaces F will be alternately at the frontand rear of the boiler. By this arrangement the iire and products ofcombustion will pass from the nrechamber through the first flue G,thence horizontall y through the rire-space F to the front end of theboiler, then up through the next iue G and horizontally back to the rearof the boiler again, and so on up and from front to rear until it passesoff through the exit-line H. The first or lower section, D', and thenext section, D2, have their fire-spaces arranged to occupy the wholecentral portion to form the furnace-chamber I of the boiler, while theirwater spaces or chambers are arranged circumferentially around theIirespace, and the section D2 is provided with the fire-door J, as

shown. The middle sections, l), have the horizontal rire-spaces andcorresponding waterchambers, the lire-spaces being connected by thealternate iiues G, formed through the 5 5 water-chambers, and the topsection, D, has the steam-dome K, and has the exit-flue VH, extendingfrom its fire chamber or space.

The usual safety-valves, gages, steam-pipes, &c., can be arranged asdesired on the boiler, 6c, and the front plate, L, of the latter ispreferably provided with doors M, through which the rines can becleaned.

At one side of the boiler is arranged a vertically-disposed stand-pipe,N, that is provided at its top with a gage, O, and is connected with thewater-spaces at their bottoms by auxiliary pipes P, Aby which the saidstandpipe will receive the water for which it is adapted. At the otherside of the boiler is 7o arranged a corresponding stand-pipe, Q, that isconnected with the water-spaccs near their tops by auxiliary pipes R,and is adapted for steam. rlhe dome K will lhrnish a sufficient quantityof dry steam. 75

The operation and advantages of my invention will be readily understood.The separable sections of the boiler are only connected. by thestand-pipes, so that, by unscrewing, the latter can be taken out forpurposes of substi- 8o tution, &c., or more sections can be easilyadded, so as to make the boiler high enough to utilize the l'ullheating-power of the furnace at the bottom. By reason ofthe arrangementof the stand-pipes, the one for water being connected with\\'aterchan1bers at the bottom and the one for steam being connected atthe top, a circulation is caused by which a more ei'lieient operation issecured; Besides, the arrangement is very simple and can be con- 9oveniently operated.

I claim as my inventionl. The combination of sections comprising a waterspace or chamber, said sections being arranged one above the other, thewater standpipe connected with the water-chambers near their bottoms,and the steam stand-pipe connected with the water-chambers near theirtops, whereby a circulation is secured, substantially as set forth. Ico

t 2. As an improvement in boilers, the combination of the boiler proper,consisting of the the steam-dome and exit-flue in the top secboiler, andconnected to the Water-chambers by branches leading to near the tops ofsaid chambers, substantially as and for the purpose set forth. Y 1 5 Intestimony that I claim the'foregoing as my own I have hereto afXed mysignature in presence of two Witnesses. f

ABNER A. PLUMMER. p

detachable sections placed one on top the other7 and each comprising aire'space and a water chamber or space7 through which is pro vided a reilue or opening, the furnace being formed in the bottom chambers orsections7 and tions, the Water standpipe disposed vertically andconnected Witlt the Water-spaces by auX- iliary pipes ork branchesleading to near the bottoms of the water-chambers, and the steamstand-pipe arranged at the opposite side of the Witnesses:

SAMUEL II. SEWARD, W. W. WAGNER.

